Method of and apparatus for forming composite articles



June 8 1926.

J. D. GRANGE ET 'AL METHOD OF AND APPARATUS FOR FORMING COMPOSITE ARTICLES Filed Oct. '7 1924 gli@ Patented June .8, 1926.

UNITED STATES .PATENT OFFICE. l

OHN DOUGLASS GRANGE, OF BROOEFIELD, AND MARION LLEWLLYN STRAWN, 0F4

LAGRANGE, ILLINOIS, ASSIGNORS '10 WESTERN /ELECTRIC COMPANY, INCORPO- RATED, OF NEW YORK, N. Y., A CQRPORATION OF NEW YORK.

. METHOD OF A ND APPARATU-'S FOR FORMING COMPOSITE ARTICLES.

f Application med october?, 1924. serial No. 742,129.

This invention relates to a method of and apparatus for forming composite articles, and more particularly to a method of and apparatus for forming stencil units.

In employing stencil blanks of the class wherein filling material impervious to ink is expressed from a tissue sheet in response to the action of a typewriting machine, in some instances a so-called backing sheet is placed between the stencil, blank and the platen of the machine. This backing sheet serves to prevent the severing of the fibers of the stencil sheet when the blank is being cut or stencilized. To facilitate the use of such stencil blanks, as well as to preserve them during storage, it is desirable to assemble the backing sheets into integral units, ready for insertion in the machine. In connection with some types of stencil blanks having a water soluble elatinous base such as those forming the Iiasis of Patent 1,- 562,228, issued to J. D. Grange, November 17, 1925, it is desirable to employ sheets having waxed on paraftned surfaces for contacting with the stencil blanks to perform the usual function of the backing sheet,

as well as to preserve the -blank' during storage for a comparatively long period of time as described andclaimed in the copending application of J D. Grange, Serial No. 742,103, filed October 7, 1924.

An object of the invention is to provide an improved method of and apparatus for forming composite articles.

In order to ,attain this object in accordance with the features of the invention there is provided a method of and apparatus'for assembling into composite articles portions having a non-adhesive coating and portions having an ingredient which may be converted into an adhesive. In a specific embodiment of the invention there is provided an 'improved method of and an apparatus for mounting a stencil blank having a water soluble gelatinous base, such as that described and claimed in the above mentioned Patent to Grange, No. 1,562,228, upon wax or paraiin coated backing ,sheets such as that described in the above mentioned copending application of J. D. Grange, Serial..

wax or paraffin coatin of that portion to be absorbed by the bo y of the sheet, thus leaving the surface of the portion substantially free of the wax or arain.. Moisture and pressure is then applied to a portion of the stencil blank 4in contact with the prepared portion of ,the backing sheet. The moisture softens the gelatine in the stencil blank so that it forms an adhesive and the pressure causes the adhesive to firmly unite the stencil blank and the prepared portion of the backing sheet.

Other objects and advantages of the invention will more. fully appear fromfthe following detailed description taken in connection with the accompanying drawings which illustrate oneV embodiment thereof, and in which; f

Fig. 1v is a fragmentary plan view of tle improved apparatus embodying the features of the invention and by which the method may be practiced,

Fig. 2 4is a fragmentary front elevation the' direction indicated by the arrows, and

Fig. 4 is a view showing the, manner in which the stencil blankr is mounted to the backing sheet. L

It is believed that the improved method for mounting stencil blanks upon backing sheets will be readily apparent from the following detaileddescri'ption of an apparatus for performing the method. p Referring now to the drawings in detail in which like reference numerals designate similar parts throughout the several views, 10 denotes a bench of usual construction on which is mounted a base 11. Smuitably journaled in brackets 12 and 13, which are integral with the base 11, is a shaft 14 to which is splined two spaced cams 15. and 16. Rigidly secured at one end to an end of the shaft '13 is a lever 17. whose other end is pivotally secured to a link 18 which may be connected to any suitable foot lever (not shown), located under the bench 10.

Positioned immediately below the shaft 14 is a rod 19 adapted to be reciprocated between guides 20.` The rod 19 is supported upon two springs, 22 and 23 suitably mounted in bores 24 and `25, respectively, in

i the base 11. Secured to the member 19 are 19 and is held in place thereon by pad retainers 29 and 30 which are suitably secured `to the member 19. The felt pad 28 projects at point 31 a suitable distance from 'the retainers 29 and 30.

` Extending through the lower part of the base 11 is 'an aperture 34 inv which' is mounted a heating element 35 which comprises a platen 36, an electric coil 37, and a base 38 which is secured to a plate 39 attached to the bottom of the base 11. Located intermediate the plate 39 and the bench 10 is a piece of asbestos 40 for insulating the bench 10 from the plate 39. It will be noted that a tip 41 of the platen 36 is immediately below-the point 31. of the felt 28 and that they are parallel to each other. Secured to one side of the base 11 is a guide 44, and located to the rear of theshaft 14 and likewise secured to the base 11 is a stop member 45. The electric coil 37 may be heated `through the means of any suitable electric.

circuit (not-shown).

The operation of this mechanism is as follows: The felt pad 28 is first moistened with water by the operator and the platen 36 is heated to the required temperature by the coil 37. A wax or parain coated backing 50, having aplurality of perforations or slots 70 for facilitating its attachment to a duplicator or mimeographing machine, is then placed under the felt.28 with one end against the member 45 and one side flush with the guide 44.l A stencil blank 51 is next laid on top of the backing sheet 50 with its end directly under the point 31 of the felt 28 and directly over the tip 41 of the platen 36. The tip 41 of the platen 36 causes the contiguous portion of the backing sheet to become heated, absorbing the coating body portion of paraflin and therebygpreparing the surface of the backlng sheet to receive an adhesive; it being apparent that before any adhesive will adherel to the surface of the backing sheet the coating of paraffin must be removed. The operator then .depresses the foot lever (not shown), drawing the lever 17 downwardly throughthe link 18, bringing the cams 15 and 16 into engagement with the elements l 26 and 27, respectively, causing the member 19 to moved downwardly, compresslng the sprmgs 22 and 23 and bringing the moistened point 31 of the felt28 into contact with the end of the stencil blank 51'. The water softensV the gelatine in the blank 51, wlnchmay be, as previously stated. of the type dlsclosed in the copending applicat1on of J. D. Grange, Serial N o. 603,125, filed 50. The lever 17 is then returned to its original position and the springs I22 and 23 force the rod 19 and its associated members back to their normal position.

The assembled stencil unit comprising the backing sheet 50 with the stencil blank 51 attached to portion 5 thereof is then removed from the machine and storedaway ready for use.

It is to be understood that from time to time additional water may b-eapplied to the felt pad 28 as required and that when the machine is not in use the electrical circuit for heating the coil 37 may be closed by any suitable means (not shown).

What is claimed is:

1. A method of forming a composite article, which consists in heating a paraffin coated member to cause the member to absorb the paraflin, thereby preparing the surlface thereof for an adhesive, moistening another member lto cause an ingredient thereof to form an adhesive, and pressing the v two members together to join them.

2'. A method of mounting a stencil blank on a backing sheet, which consists in attaching them together by an ingredient contained in one of them.

3. A method of mounting a stencil blank,'

having a gelatinous base, on a backing sheet, which consists in transforming the base into an adhesive and thereby attaching them together.

4. A method of mounting a stencil blank on a backing sheet, which consists in treat-- ing one to cause an ingredient thereof to form an adhesive, and pressing them together to unite them with the adhesive.

5. A method of mounting a stencil blank on a backing sheet, which consists in preparing the surface of one'for receiving yan adhesive, moistening the otherto cause an in- 'gredient thereof to form an adhesive, and pressing them together to unite them with the adhesive.

6. A method of mounting a stencil blank on a parain coated backing sheet, which consists in removing the paralin from the surface of the backing sheet to prepare it to receive an adhesive, moistening the stencil blank to cause an ingredient thereof to form an adhesive, and pressing the stencilfblank and the backing 7. A method of mounting a stencil blank l on a parafncoated backing sheet of fibrous material, which consists in heating the backgether to join them. I A.

ing sheet to cause the sheet to absorb the and the backing sheet 'together to unite them I by the adhesiv 8. In an apparatus for forming a composite article, means for heating a paraffin coated fibrous member to cause the member to absorb theparaflin, thereby preparing the surface thereof for an adhesive, means for moistening another member causing an 1ngredient thereof to form an adhesive, and

means for pressing the two members together vto attach them together by' the adhesive.

9. In an apparatus for mounting a stencil blank on a backing sheet, means for moistening the stencil blank to cause an ingredient' thereof to form an adhesive, and means for pressing the stencil blank'and the backing sheet together to-unite them bythe adhesive.

10. In an apparatus for mounting a stencil blank on a backing sheet, means for applying moisture to cause an ingredient of one of said parts to form an adhesive, and means for pressing them, together to unite them by the adhesive.

11. In an apparatus for mounting a stencil blank on a backing sheet, means 'for preparing the surface thereof for an adhesive, means for moistening the stencil' blank to cause an ingredienttheeof to form an ,adhesive, and means for passing the stencil blank and the backing sheet together to join them. i

12. In an apparatus for mounting a stencil blank on a paraffin coated backing sheet, means for heating the paraffin coated backing sheet to cause the sheet to absorb the parafiin, thereby preparing the surface thereof for an adhesive, means for moistening the stencil blank to cause an ingredient thereof to form an adhesive, and means for pressing the stencil blankand the backing sheet to- 13. In an apparatus for mounting a stencil blank on a paain coated backin sheet, means for heating the paraffin coated backing sheet to cause the sheet to labsorb the paraffin, thereby' preparing the surface thereof forl an adhesive, means for moistening the stencil blank to cause an ingredient thereof to form an adhesive, and means for pressing the stencil blank and the backing -sheet together in such a manner that the adhesive unites the stencil blank to the prepared surface of the backin sheet.

14. n an apparatus for forming a composite article, a heating element for preparing the surface of a paraffin coated member, lmeans for moistening another member to cause an ingredient thereofto form an ad:

hesive, and means for pressing the two members together in such a manner that lthe adhesive will cause the second mentioned member to be attached to the prepared surface of the first mentioned member.

l5. In an apparatusfor mounting a stencil blank on a paraiiinl coated backing sheet, a heating element for heating the paraffin coated backing sheet to cause the sheet to absorb the paraffin, thereby preparing the surface thereof for an adhesive, means for moistening the stencil `blank to cause an ingredient thereof toform an adhesive, and means for pressing the stencil blank to the 'backing sheet together in such a manner that the adhesive secures the stencil blank to the hesive, and means for 4pressing the stencil" blank and the backing sheet together in such a manner that the adhesive secures the stencil blank to the prepared surface of the backing sheet. l

17. In an apparatus for mounting a stencil blank on, a para-Hiny coated backing sheet, a heating element for heating the parain coated backing sheet to cause the sheet to absorb the paraiin, thereby preparing the surface thereof for an adhesive, means including a moistened felt for moistening the stencil blank to cause an ingredient' thereof to form an adhesive, and means for pressing the stencil blank and the backing sheet together in such a manner that the adhesive secures the stencil blank to the prepared surface of the backing sheet.

18. In an apparatus for mounting a stencil blank on a paraiin coated backing sheet,

`means for'heating the paraffin coated backing sheet to cause the sheet to absorb lthe paraflin, thereby preparing the surface thereof for an adhesive, means including a moistened felt for moistening the stencil blank to cause an ingredient thereofto form an adhesive, and means for contemporaneously bringing the felt into contact with the stencil blank and tol pressl the stencil blank andthe backing sheet together in such a manner that the adhesive. secures the stencil blank to the prepared surface'of the backing sheet.

In witness whereof, We hereunto subscribe our names this 27th day of September A. D.,

JOHN DoUGLAss GRANGE. MARION 4IJJIJWLLYN STRAWN. 

